What does ‘Making random words past-tense to mean drunk’ mean?

Brits are known for favouring a drink or two, so much so that almost any noun can be used as a substitute for “drunk.”

In his stand-up show, British comedian Michael MacIntyre said: “You can actually use any word in the English language and substitute it to mean drunk. It works.”

Examples include “trollied,” “smashed,” and “gazeboed.”

“I was absolutely car-parked last night.”